Stoichiometry
© D Scott; CHS
, Stoichiometry
“stochio” = Greek for element
“metry” = measurement
Stoichiometry is about measuring the amounts of
elements and compounds involved in a reaction.
Consider the chemical equation:
4NH3 + 5O2 → 6H2O + 4NO
There are several numbers involved.
What do they all mean?
© D Scott; CHS
, Stoichiometry
4NH3 + 5O2 → 6H2O + 4NO
Recall that Chemical formulas represent numbers of atoms
NH3 1 nitrogen and 3 hydrogen atoms
O2 2 oxygen atoms
H 2O 2 hydrogen atoms and 1 oxygen atom
NO 1 nitrogen atom and 1 oxygen atom
© D Scott; CHS
© D Scott; CHS
, Stoichiometry
“stochio” = Greek for element
“metry” = measurement
Stoichiometry is about measuring the amounts of
elements and compounds involved in a reaction.
Consider the chemical equation:
4NH3 + 5O2 → 6H2O + 4NO
There are several numbers involved.
What do they all mean?
© D Scott; CHS
, Stoichiometry
4NH3 + 5O2 → 6H2O + 4NO
Recall that Chemical formulas represent numbers of atoms
NH3 1 nitrogen and 3 hydrogen atoms
O2 2 oxygen atoms
H 2O 2 hydrogen atoms and 1 oxygen atom
NO 1 nitrogen atom and 1 oxygen atom
© D Scott; CHS